An image stabilisation system (ISS) is part of the high resolution telescope (HRT) of the PHI instrument on board of the Solar Orbiter satellite, to be launched 2017. The ISS will reduce the relative pointing error of the instrument to allow high precision polarimetric measurements of the photospheric magnetic field. The ISS is based on a correlation tracker principle with a Shack Hartmann wave front sensor with only one sub aperture. The displacements will be compensated with a sub arcsec resolution from a fast moving M2 mirror as tip tilt mirror. Details of the ISS design, the piezo driven tip-tilt drive and the fast acquisition camera will be presented.